I have an iBook G4, with OS X 10.4.11 Recently this computer is changing over tp the sleep mode very often, I hit the return key and it comes out of it, but returns to sleep mode within a few seconds. At other times this will not happen, computer operates normally Is it the settings for sleep mode which is causing the problem. I do not want this computer to go sleep, what are the settings for this. All help appreciated. Regards Sean Finnegan